Getting "WARN [org.jgroups.protocols.UNICAST2] not found in retransmission table" infrequently in clustered EAP 6 / JDG 6

Solution Unverified - Updated -

Issue

The following WARN message was shown infrequently in clustered EAP 6:

WARN  [org.jgroups.protocols.UNICAST2] (OOB-15,shared=udp) jboss-node1/web: (requester=jboss-node2/web) message jboss-node2/web::3422869 not found in retransmission table of jboss-node2/web: [3422549 | 3422549 | 3422872] (322 elements, 1 missing)

There were no other WARN or ERROR messages around the above message.

What is a cause of this message? May I ignore this message?

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 6.x
  • Red Hat JBoss Data Grid (JDG)
    • 6.x

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